The HyangyakBoncho(鄕藥本草) in Vol. 76-85 of the Hyangyakjipseongbang(鄕藥集成方) deals with the Hyangyak, medicinal stuffs produced in the territory of Chosun from the late times of Corea to the early times of Chosun. It also includes whole knowledges and the way to process(?製) of Oriental medical botany(本草) in that period of Chosun and China. It contains all the knowledges of the Hyangyak and the Boncho(鄕藥本草學) so that it can be helpful for the Chosun to apply to medicines. This study shows the characters of HyangyakBoncho(鄕藥本草) through analyzing. In future it is supposed that this report is the first approach to the core of the Hyangyakjipseongbang(鄕藥集成方), which describes medicines with prescriptions made up of the Hyangyak mainly.